The 7.2 VDC, 2280mAh NP-FZ100 Rechargeable Lithium-Ion Battery from Sony
is a high-capacity Z-series power source for select digital cameras.
This battery has InfoLITHIUM support for displaying the remaining charge
of the battery on the camera's LCD screen.

The EN-EL15a is a rechargeable Li-ion battery that powers select Nikon
DSLR cameras. The battery uses the MH-25a battery charger. These
rechargeable batteries provide extended life and consistent power, even
in colder conditions.